The guy near the end of this video shows how he waterproofed his iPhone. I imagine applying this method to the major components of the MBP will go a long way to ensuring "liquid" won't destroy anything.
And for disassemnly, iFixit can help you there.
So, disassemble your Macbook Pro, waterproof the components, especially the motherboard. I doubt you'll be able to submerge it afterwards, but it'll resist spills.
Also, I haven't actually done this or anything, so, you know, no lawyers.